Colorado Millennial Site - Credit: Wikimedia Commons
Colorado Millennial Site is a prehistoric Paleo-Indian archaeological site located near Ruxton in the southeastern part of the U.S. state of Colorado, sitting along the border between Baca and Las Animas counties. It is also known by its site ID, 5LA1115, and the names Hackberry Springs and Bloody Springs. Read more on Wikipedia
Source: en.wikipedia.org